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# Lesson 2.1 Key Terms

TermDefinitionExample
Distributive Property Full name: distributive property of multiplication over addition. The property that allows us to distribute ("multiply through") an AND across several OR functions. For example, a(b+c)=ab+ac. I used the distributive property to correctly multiply.
Least Significant Bit (LSB) The rightmost bit of a binary number. This bit has the number's smallest positional multiplier. In 10111, the least significant bit is the far right 1.
Logic Circuit Any circuit that behaves according to a set of logic rules. A 74LS02 is a logic gate that can be used in the circuit.
Logic Diagram A diagram, similar to a schematic, showing the connection of logic gates. We use the logic diagram to correctly place the wires for the circuit to work.
Maxterm A sum term in a Boolean expression where all possible variables appear once in true or complement form. The maxterm is when all variables are 1
Minterm A product term in a Boolean expression where all possible variables appear once in true or complement form. The minterm is when all variables are 0
Most Significant Bit (MSB) (MSB) The leftmost bit in a binary number. This bit has the number's largest positional multiplier. For example in the binary number 0111, the most significant bit is 0.
Product-of-Sums (POS) A type of Boolean expression where several sum terms are multiplied (AND'ed) together. 1*0=0
Product Term A term in a Boolean expression where one or more true or complement variables are AND'ed. A 1 = 1 that is product term
Sum-of-Products (SOP) A type of Boolean expression where several product terms are summed (OR'ed) together. A whole circuit would hold a sum of products.
Sum Term A term in a Boolean expression where one or more true or complement variables are OR'ed. A 1 would = a 0 and that would be the sum term
Truth Table A list of all possible input values to a digital circuit, listed in ascending binary order, and the output response for each input combination. In a truth table with three variables there will be nine outputs
DeMorgan's Theorems 1) Theorem stating that the complement of a sum (OR operation) equals the product (AND operation) of the complements, and 2) Theorem stating that the complement of a product (AND operation) equals the sum (OR operation) of the complements. I used the DeMorgan theorem to make my circuit with AND and Or gates
Created by: EdwinJD